If I understand correctly, the purpose of this site is to sell photography tours to New Zealand, yes?
If that's the case, the first thing you need to do is work on your bios. You need to list your accomplishments as professional photographers (such as gallery shows with links to the galleries' websites, lectures given, books written, etc.). I just don't think asking someone to give you between $2,500 and $9,500 for a tour just because "we are landscape photographers" is going to cut it.
I also think there should be a significant and fabulous photo on the front page. When you click on the link, there is no WOW factor whatsoever, and first impressions count.